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pochemuha
2 years ago
8

Solve the simultaneous equation 4x-y=9 2x-3y= -23

Mathematics
1 answer:
MrMuchimi2 years ago
4 0

Answer:

x = 5

y = 11

Step-by-step explanation:

y = 4x - 9

2x -3(4x - 9) = -23

2x - 12x + 27 = -23

-10x = -23 -27

-10x = -50

minus cancels out

x = 5

y = 4(5) -9

y = 20 - 9

y = 11

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3x2 + 2(x2 – 20) = 16 - 2x2
lana66690 [7]

3x(2) + 2(2x - 20) = 16 - 2x(2)

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10x - 40 = 16 - 4x

14x - 40 = 16

14x = 56

x = 4

Hope this helps! ;)

8 0
2 years ago
Can someone help please?????
frutty [35]
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8 0
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6 0
3 years ago
Read 2 more answers
Choose all of the points that would be on a graph for y=7x
pav-90 [236]
Hey there! :D

Plug in the points to see if they work. 

y=7x

(2,14) -> (x,y)

14=7*2

14=14

That works. 

(0,0) 

0=7*0

0=0

That works 

(1,7)

7=7*1

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That works. 

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I hope this helps!
~kaikers
3 0
3 years ago
A large container holds 5 gallons of water. It begins leaking at a constant rate. After 20 minutes, the container has 3 gallons
jeka57 [31]

The container will take 25 minutes to go from full to empty.

Explanation:

In 15 minutes, the container has lost 3 gallons of water (

5

−

2

=

3

).

Since the leak is at a constant rate, we can determine that every five minutes the container loses one gallon.

So for the container to lose the full 5 gallons will take 25 minutes (

5

×

5

=

25

)

4 0
3 years ago
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